Cherrying attachment



arch I W. R. TOMLINSON CHERRYING ATTACHMENT Filed June 16 1920 2 Sheets-Sheet 1 Qwwmtoz Mmh 25' ,1924; 1,487,822 W. R. TOMLINSQN CHERRYING ATTACHMENT filed June 16, 1920 2 Sheets-Sheet? Patented Mar. 25, 1924.

warren meters earner caries.

WILLIAM R. TOMLINSON, F HARTFORD, CONNECTICUT, ASSIGNOE T0 PRATT & WHIT- NEY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

CHEBBYING ATTACHJNIENT.

Application filed June 18, 1920. Seria1 No. 389,424.

To all whom it may concern:

Be it known that I, VVILLIAM R. TOMLIN- soN, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Cherrying Attachments, of which the following is a specification.

This invention relates to metal working 1 machines and particularly to an attachment adapted to be secured to such a machine in a manner adapting the same to be readily moved to an operative or an inoperative position on the machine. It is an object of the invention to provide such an attachment that may be securely mounted on the machine and when not in use may be easily moved on its support on the machine frame to a position entirely clear of the work table and the spindle and tool on the machine. More specifically, it is an object of the invention to provide a cherrying attachment comprising a supporting arm adapted to be pivotally mounted on the column of a vertical spindle milling or like machine and capable of being moved about such pivot to an operative or an inoperative position respectively.

A further object of the invention resides in providing a specially constructed driving connection for the attachment tool which can very readily and easily be removed and replaced and which connection provides a friction drive whereby should the tool strike an obstruction, the frictional connection will slip and thereby prevent breakage of the tool and its cooperating parts.

Other objects of the invention will become apparent as the description proceeds.

Referring to the figures of the drawings;

Figure 1 is a perspective view illustrating a vertical spindle milling machine provided with my attachment, the same being shown in the operative position.

Fig. 2 is a fragmentary view of Fig.1 il- Fig. 5 is a fragmentary section through the cutter-supporting blocks taken on the line 5-5 of Fig. 3 and illustrating the engaging surfaces thereof.

lustrating the attachment in its inoperative Fig. 6 is a fragmentary plan view of the guard adapted to surround the tool driving gears.

In cherrying attachments heretofore used on milling and like machines, it has been necessary to entirely remove and replace the attachment on the machine whenever it has been desired to use the machine tool itself or the attachmentrespectively. Such a construction consumes a great amount of time, involves considerable work and is very cumbersome and inconvenient. The present invention aims to securely mount the attachment on the tool-supporting column or frame of the machine in such manner that it may be conveniently and quickly moved to either an operative or an inoperative position. Fur thermore, the attachment may be permanently left in position on its support where it is always reac y for immediate operation. The mounting for the attachment preferably is in the form of a pivotal 'comiection, as illus trated, and, as will be noted, its movement to the operative position involves no change whatever in the construction of the milling machine spindle or its cooperating parts. It should be understood that while the attachment has been shown in connection with a vertical spindle milling machine, the invention is not limited to this or other details illustrated but may be modified within the scope of the appended claims.

Referring to the drawings, 1 represents the base and 2 the column of a vertical spindle milling machine. A work supporting knee 3 is adjustable vertically on guides 4 of the column by means of a screw 5. A work support 6 is supported on the knee and may be adjusted in two right angular directions by means of hand wheels 7 and 8 operating the slides7 and 8 and in a rotary angular direction by means of a. hand wheel 9. By means of this last adjustment the cutting operation may be performed at any desired angle on the work. A cutter spindle lOis mounted in vertical bearings 11 and 12 on the column and is d iven by means of a pulley 13 secured thereto, the column thereby providing a rigid supportfor the spindle. A driving belt 14 extends over the pulleys 13 and 15 and over idler pulleys 16 and 16- as illustrated, the cone pulley 15 being driven from any suit able source of power. As seen in Figs. 2 and 3, a bevel gea 17 and a tool 18 are supported at the lower end of the spindle, the gear being threadedly mounted on the spindle, as shown in Fig. 3. A plunger illustrated at 19 is adapted to be engaged with a hole in the pulley 13 to hold the pulley and spindle from rotation while removing the gear or tool from the spindle.

The attachment herein comprises a supporting arm 20 pivotally mounted on a bracket 21 on the column 2 and supporting the cutting tool and its cooperating parts at the free end thereof. The free end of the arm is formed into a supporting block 22 for the tool and its driving means, as illustrated in detail in Figs. 3 and 4. This block is provided with two plane surfaces 23 and 24 arranged at right angles to each other and adapted respectively to receive the cutter supporting block 25 and engage the surface 24 on the column as is hereinafter described. The surface 23 has mounted thereon the block 25 vertically adjustable by means of a screw 26, the screw being journaled in the block 22 at 26' and threadedly engaging the nut 27 secured to the block 25 by means of a set screw 27 H The two blocks have a vertical key connection at 28, as shown more clearly in Fig. 5, and a pair of clamping screws 29 passing through slots 30 in the block 25 and threadedly engaging the block 22 serve to rigidly secure the block 25 in its adjusted position on the block 22. The rotary cutter 31 is adapted to receive the supporting trunnions 32 and 33 at its center. The guide shoes 32 and 33 of both trunnions are adjustably mounted in the rearwardly extending portion 34 of the block 25, as illustrated in Figs. 3 and 4, the trunnion 32 being adapted for a fine adjustment by means of the screw 35 and both trunnions being adapted to be clamped in place by means of set screws 36.

The cutter 31 may be driven by any suit: able driving means but I preferably operate the same from the main machine as will now be described. Broadly this mechanism comprises two gears 37 and 38 mounted on a shaft 39 within the block 22, one of such gears being adapted to engage the before mentioned bevel gear 17 on the spindle 10 and the other gear being adapted to engage and drive the cutter 31. In a cherrying attachment the supporting trunnions for the cutter are necessarily very small and light in order to allow the cutter to cut practically the full depth of its radius into the work. A severe shock or strain would quickly break these trunnions and perhaps other parts of the driving connection. In order to avoid such an occurrence, I preferably provide a frictional connection between the driving gear 17 on the spindle 10 and the tool 31. This frictional connection may be embodied in several forms, one of which is illustrated herein.

The frictional driving assembly within the block 22 comprising the tubular shaft 39 and its cooperating parts are of a special construction for a purpose to be hereinafter noted. Referring particularly to Fig. 3, it will be seen that the tubular shaft 39 is mounted within bearings 40 and 40 of the arm block 22 and that the cutter engaging gear 38 is keyed to this shaft and seated against a shoulder 41 thereon. A bushing 42 fits over the shaft within the bearing 40 and seats against the gear 38 and a nut 43 threaded onto the shaft seats against the bearing 40. The shaft 39 is held in position within the arm block 22 by means of an annular flange 44 engaging the outer end of the bearing 40 and the nut 43 engaging'the outer end of the bearing 40. The bevel gear 37 is mounted on the end of the shaft 39 between the flange 44 and a flange 45 on a rod 46 extending through the shaft 39. The shaft 39 and rod 46 are secured from relative rotation by means of a pin 47 and frictional washers 48 are preferably provided between the flanges and the gear 37. A tightening nut 49 threadedly engaging the rod 46 and seating against the shaft 39 serves to vary the frictional grip of the flanges on the gear 37 and a lock nut 49 is adapted to secure the nut 49 in position.

I preferably provide a guard for the engaging bevel gears 17 and 37 which guard comprises an element 50 surrounding the gear 37 and adapted to engage over the outer end of the bearing 40 and to be secured thereon by means of a set screw 50. The guard 50 for the gear 17 is divided and pivoted at 51 and aspring latch 52 serves to hold the same in position around the gear 17.

The arm 20 is secured to the bearing 12- of the column 2 in its operative position, illustrated in Fig. 1, by means of a clamping bolt 53 and a dowel pin 54 in the arm block 22 engaging in the holes 53 and 54*? respectively in the said bearing. The arm may be secured in its inoperative position, illustrated in Fig. 2, by means of a clamp; ing handle 55.

For performing different shaped and sized cuts in the work it is necessary to employ cutters of diflerent shapes and sizes and such cutters may be readily interchanged in the block 25 by means of the construction illustrated. A change to a cutter of a different diameter requires the adjustment of the cutter toward and from the cutter engaging and driving gear 38. This adjustment may readily be accomplished by means of the screw 26, the cutter supporting block 25 being thereafter securely clamped in its adjusted position by means of the clamping screws 29. It may also be necessary to frequently change the driving gear 38 to one of another size or one having teeth of different shape. Such a change may readily be accomplished by first removing the guard and the nut 43 and thereafter. withdrawing the shaft 39 from within the gear 38.

.VVhat- I claim is:

1. A cherrying attachment comprising the combination of a supporting element adapted to be mounted for movement to an oper ative or an inoperative position on the frame of a metal working machine, means adjacent one end of the element for supporting the same on the machine, means adjacent the other end for rigidly securing the element to the machine in the operative posit-ion, means on the element for supporting a rotary tool therein, and driving means for the tool.

2. A cherrying attachment comprising the con'ibination of a supporting element adapted to be mounted for movement to an operative or an inoperative posit-ion on the frame of a metal working machine, means atone end of the element for supporting the same on the frame of the machine, means for rigidly securing the other end of the element to the machine in the operative position, means on the element for supporting a rotary tool therein, and driving means for the tool comprising a member adapted when the element is in its operative position to be connected with a driver on the machine.

8. A cherrying attachment comprising the combination of a supporting arm adapted to be mounted for pivotal movement to an operative or an inoperative position on the frame of a metal working machine, means on one end of the arm for pivotally supporting the same for swinging movement on the machine, means for rigidly securing the arm to the machine in the operative position, means on the arm adjacent the said securing means for supporting a rotary tool therein, and. driving means for the tool.

4. A cherrying attachment comprising the combination of a supporting arm adapted to be mounted for pivotal movement to an operative or an inoperative position on the frame of a metal working machine, means on one end of the arm for pivotally supporting the same for swinging movement on the machine, means for rigidly securing the free end of the arm to the machine in the operative posit-ion, means on the arm for supporting a rotary tool therein, and driving means for the tool comprising a member adapted when the arm is in its operative position to be connected with a driver on the machine.

5. A cherrying attachment comprising the combination of a supporting arm adapted to be mounted for pivotal movement to an operative or an inoperative position on the frame of a metal working machine, means on one end of the arm for pivotally supporting the same for swinging movement on the machine, means for rigidly securing the arm to the machine in the operative position,

means at the free end of the arm for supporting a rotary tool therein, and driving means for the tool comprising a gear adapted when the arm is in its operative position to mesh with a gear on the machine.

6. A cherrying attachment comprising the combination of a supporting element adapted to be mounted for movement to an operative or an inoperative position on the frame of a metal working machine, means for rigidly securing the element to the machine in the operative position, means on the element comprising a pair of trunnions for removably supporting a formed rotary cherrying tool therein, driving means for the tool com prising a gear adapted to mesh with a gear on the machine, and a frictional connection between the first said gear and the tool.

7. A cherrying attachment comprising the combination of a supporting element adapted to be mounted for movement to an opera tive or an inoperative position on the frameof a metal working machine, means for rigidly securing the element to the machine in the operative position, means on the element comprising apair of trunnions for removably supporting a formed rotary cherrying tool therein, driving means for the tool comprising a gear adapted to mesh with a gear on the machine, a frictional connection be tween the said gear and the tool, and means to Vary the frictional resistance of the frictional connection.

8. A cherrying attachment comprising the combination of a supporting element adapted to be mounted for movement to an operative or an inoperative position on the frame of a metal working machine, means for rigidly securing the element to the machine in the operative position, means on the element comprising a pair of trunnions for removably supporting a formed rotary cherrying tool therein, driving means for the tool comprising a shaft having two gears thereon, one of such gears being adapted to drive the tool and the other gear being adapted to mesh with a gear on the machine, one of such gears being frictionally connected to the shaft, and means for varying the frictional resistance of the frictional connection.

9. In combination with a metal Working machine comprising a base, a Work table mounted thereon, a tool support also on the base and a cutter spindle mounted on the support adjacent the table, an attachment comprising an element mounted on the support at a point remote from the spindle for movement to an operative position adjacent the table or to an inoperative position removed from the table, means for rigidly securing the element to the machine in the operative position, means on the elementfor supporting a rotary tool therein, and driving means for the tool.

10. In combination with a metal working machine comprising a base, a work table mounted thereon, a column also on the base and a cutter spindle mounted on the column adjacent the table, an attachment comprising an element mounted on the column for movement to an operative position adjacent the table or to an inoperative position removed from the table, means for rigidly securing the element to the machine in the op era-tive position, means on the element for supporting a rotary tool therein, and driving means for the tool comprising a member adapted when the element is in its operative position to be connected with a driver on the machine.

11. In combination with a metal working machine comprising a base, a work table mounted thereon, a column also on the base and a cutter spindle mounted on the column adjacent the table, an attachment comprising an element mounted on the column for movement to an operative position adjacent the table or to an inoperative position removed from the table, means for rigidly securing the element to the machine in the ope ative position, means for securing the element in its inoperative position, means on the element for supporting a rotary tool therein, and driving means for the tool.

12. In combination with a metal working machine comprising a base, a work table mounted thereon, a tool support also on the base and a cutter spindle mounted on the support adjacent the table, an attachment comprising an arm mounted on the support on a pivot remote from the spindle for pivotal movement thereon to an operative position adjacent the table or to an inoperative position removed from the table, means for rigidly securing the arm to the machine in the operative position, means on the arm for supporting a rotary tool therein, and driving means for the tool comprising a member adapted when the arm is in its operative position to be connected with a driver on the machine.

13. In combination with a metal working machine comprising a base, a work table mounted thereon, a column also on the base and a cutter spindle mounted on the column adjacent the table, an attachment comprising an arm mounted on the column for pivotal movement to an operative position adjacent the table or to an inoperative position removed from the table, means for rigidly securing the arm to the machine in the operative position, means on the arm for supporting a rotary tool therein, and driving means for the tool comprising a member adapted when the arm is in its operative position to be connected wit-h a driving element on the spindle.

14. In combination with a metal working machine comprising a base, a work table mounted thereon, a column also rising from the base and a vertical tool-supporting spindle mounted on the column over the table, an attachment comprising an arm mounted on the column for movement to an operative position over the table or to an inoperative position removed from the table, means for rigidly securing the arm to the machine in its operative position, means on the arm for supporting a rotary tool therein, a gear on the vertical spindle, and driving means for the tool comprising a gear adapted when the arm is in its operative position to mesh with the said gear on the spindle.

15. In combination with a metal working machine comprising a base, a work table mounted thereon, a tool support also on the base and a cutter spindle mounted on the support adjacent the table, an attachment comprising an arm mounted on the support for movement about a vertical pivot to an operative position adjacent the table. or to an inoperative position removed from the table, a clamping bolt mounted in the arm and adapted to engage the frame of the machine to rigidly secure the arm to the machine in its operative position, means on the arm for supporting a rotary tool therein, and driving means for the tool comprising a member adapted when the arm is in its operative position to be connected with a driver on the machine.

16. In combination with a metal working machine comprising a base, a work table mounted thereon, a column also rising from the base and a vertical spindle mounted on the column over the table, an attachment comprising an arm mounted on the column for movement to an operative position over the table or to an inoperative position removed from the table, means for rigidly securing the arm to the machine in its operative position, means on the arm for supporting a rotary tool therein, a gear on the vertical spindle, driving means for the tool comprising a gear adapted when the arm is in its operative position to mesh with the said gear on the spindle, and a guard on the arm adapted to surround the said meshing gears in the operative position thereof.

17. In combination with a metal working machine comprising a base, a work table rotatably adjustable thereon, a tool support also on the base and a cutter spindle mounted on the support adjacent the table, an attachment comprising an element mounted on the support for movement to an operative position adjacent the table or to an inoperative position removed from the table, means for rigidly securing the element to the machine in the operative position, means on the element for supporting a rotary tool therein, and driving means for the tool.

18. In combination with a metal working machine comprising a base, a work table rotatably adjustable thereon, means for r0- tatably adjusting the table, a tool support also on the base and a cutter spindle mounted on the support adjacent the table, an attachment comprising an arm mounted on the support for pivotal movement to an operative position adjacent the table or to an inoperative position removed from the table, means forrigidly securing the arm to the machine in the operative position, means on the arm for supporting a rotary tool there- 10 In testimony whereof, I hereto afliX my 15 signature.

WILLIAM R. TOMLINSON. 

